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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 30 hours after estrus begins






2. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






3. 24 hours before end of estrus cycle






4. Days which have decreasing daylight hours

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5. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






6. Can survive ~7 days in cow. vast majority <48 hours






7. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated






8. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






9. Why does estrus happen before ovulation?






10. Animals which have many estrous periods per year (ex: cow - sow)






11. Luteolysis happens because of the ____________ hormone






12. What about the sperm for a bull which has been castrated but still has testicles?






13. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






14. Days which have increasing daylight hours

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15. Scar tissue plugs up chambers of udder






16. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






17. Prevent the cow from getting an infection from the calve






18. Failure to have both testis (gonads) descend






19. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






20. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






21. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






22. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






23. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






24. Contains and regulates the temp of the testes for sperm production






25. When are steers and heifers weaned from bottle feeding?






26. Animal which has been castrated after puberty






27. Superior genes are _______ to multiply






28. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






29. Why Dairy calves are fed powdered milk.






30. 19-23 (21) days






31. 1-3 days






32. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






33. Scar tissue plugs up chambers of udder






34. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






35. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






36. When are dairy cattle dehorned?






37. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






38. Animals which have only one estrous cycle (ex: dog - fox)






39. Start of the reproductive tract for the female. located outside of the body






40. 336 days






41. To remove/separate testicles from animal's body before animal reaches puberty






42. 4-6 days






43. Male on one pin and female on other side






44. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






45. 283 days






46. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






47. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






48. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






49. Urinary calculi.






50. Sperm is produced here